US20120014397A1 - Continuous wave or ultrafast lasers - Google Patents
Continuous wave or ultrafast lasers Download PDFInfo
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- US20120014397A1 US20120014397A1 US12/837,530 US83753010A US2012014397A1 US 20120014397 A1 US20120014397 A1 US 20120014397A1 US 83753010 A US83753010 A US 83753010A US 2012014397 A1 US2012014397 A1 US 2012014397A1
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- spectrally separate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1307—Stabilisation of the phase
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2308—Amplifier arrangements, e.g. MOPA
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2308—Amplifier arrangements, e.g. MOPA
- H01S3/2325—Multi-pass amplifiers, e.g. regenerative amplifiers
- H01S3/2333—Double-pass amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
- H01S3/2391—Parallel arrangements emitting at different wavelengths
Abstract
Description
- This invention was made with Government support under Air Force contract, FA8721-05-C-0002, Program #221. The Government may have certain rights to this invention.
- 1. Field of Invention
- The present invention relates to short pulse generation by diode and fiber lasers using mode-locking or Q-switching technologies. In particular, the invention relates to such systems employing plural amplifiers arranged to reduce the effects of non-linearities on gain-bandwidth and power output.
- 2. Discussion of Related Art
- Short pulse generation by diode and fiber lasers employing mode-locking or Q-switching technologies have been an active area of research in the last three decades. The performance of such systems, however, has yet to approach other solid state lasers.
- It has been observed that the poor performance of conventional short-pulse mode-locking or Q-switching systems is mainly due to small cross section area and long interaction length of the fibers used. In fiber lasers, the pulse energy is limited to about one milli-Joule, with a few Watts of average power. In semiconductor lasers, the pulse energy is even more severely limited, typically to the pico-Joule range with a few milli-Watts of average power. The maximum pulse energy that can be extracted from semiconductor laser is given by the pulse gain saturation energy:
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- where ω0 is the center frequency, A is the cross-section area of the active region, Γ is the confinement of the mode in the active region, and dg/dN is the material differential gain. A typical single-mode diode laser has cross section area, A, of about 5 μm2 and a typical fiber laser has a cross section area, A, of about 400 μm2. On the other hand, a typical bulk solid state laser has section area 10,000,000 μm2 or greater. Furthermore, the performance of conventional systems has been found to be severely limited by non-linearities. In semiconductor lasers, if they were limited only by the gain-bandwidth, the gain-bandwidth can support pulses having a duration as short as a few femto-seconds, but due to nonlinear phase changes associated with gain-saturation, the pulse length that can actually be supported is longer, limited to a duration of a few pico-seconds.
- According to aspects of one embodiment, a laser system comprises: a seed oscillator, having a seed output; dispersive optics, operative to receive the seed output and divide the seed output into spectrally separate seed components; an array of individually addressable, phase adjustable laser amplifiers corresponding to the spectrally separate components, each laser amplifier receiving as its seed one of the spectrally separate seed components and producing one of the spectrally separate amplified components; and phase actuators controlling the individually addressable, phase adjustable laser amplifiers. In the laser system, the individually addressable, phase adjustable laser amplifiers may double-pass the spectrally separate seed components, and the dispersive optics may then combine the spectrally separate amplified components into an output beam. Such a system also may include an isolator disposed in a position to pass the seed output from the seed oscillator to the dispersive optics, and to redirect the output beam away from the seed oscillator. Alternatively, the individually addressable, phase adjustable laser amplifiers may direct the spectrally separate amplified components back along a path separate from that along which the spectrally separate seed components are received, in which case there may be separate dispersive optics, operative to receive the separate amplified components from the phase adjustable laser amplifiers and combining the spectrally separate amplified components into an output beam. According to another variation, the laser system may further include: a sampler receiving the amplified output and producing a sampled output; a non-linear crystal receiving the sampled output; and a photo-detector; whereby the photo-detector produces an output representative of detected phases of the spectrally separate amplified components, the output of the photo detector being applied to the phase actuators to control the individually addressable phase adjustable laser amplifiers. According to a further variation, the laser system may yet further include: a stochastic parallel gradient descent phase controller receiving the photo-detector output and controlling the individually addressable phase adjustable laser amplifiers. Alternatively, the laser system may yet further include: a self-synchronous coherent beam combining phase controller receiving the photo-detector output and controlling the individually addressable phase adjustable laser amplifiers. Yet alternatively, the laser system may yet further include: a phase controller constructed and arranged to produce a mode-locked output at the amplified output. Even yet alternatively, the laser system may further include: a phase controller constructed and arranged to produce a phase randomized, continuous wave output at the amplified output. According to other aspects of the embodiment of the laser system the dispersive optics further comprise 1-D dispersive optics. According to yet other aspects of the embodiment of the laser system the dispersive optics further comprise 2-D dispersive optics. According to even yet other aspects of the embodiment of the laser system the dispersive optics further comprise wavelength beam combining optics.
- According to aspects of another embodiment, a method of operating a laser system comprises: generating a seed signal; dividing the seed signal into spectrally separate component signals; amplifying the spectrally separate component signals; recombining the spectrally separate component signals into an amplified output; and controlling phases of the amplified spectrally separate component signals. According to other aspects of this embodiment, controlling the phases may further include: adjusting the phases into alignment so the amplified output is a mode-locked signal. According to yet other aspects of this embodiment, controlling the phases may further include: adjusting the phases into random relationship so the amplified output is a continuous wave signal. In another variation, amplifying may further comprise double-passing the spectrally separate component signals through an amplifier array. In that case, dividing the seed signal may further comprise using dispersive optics; and recombining the spectrally separate component signals may further comprise using the dispersive optics used for dividing. Amplifying may alternatively comprise single-passing the spectrally separate component signals through an amplifier array.
- The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures is represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. In the drawings:
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FIG. 1 is a schematic block diagram of a folded optical system according to aspects of embodiments of the present invention; -
FIG. 2 is a schematic block diagram of an unfolded optical system according to aspects of embodiments of the present invention; and -
FIG. 3 is a flow chart illustrating methods according to aspects of embodiments of the present invention. - This invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” “having,” “containing,” “involving,” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.
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FIG. 1 is a schematic block diagram showing a basic folded architecture for generating high power CW or ultrafast lasers according to aspects of embodiments of the invention. Systems according to the illustrated basic architecture, 100, include a mode-locked master oscillator, 101; a Faraday isolator, 103, including an input polarizer which separates and redirects the return signal away from oscillator, 101, as output beam, 115; wavelength separating optics, 105, including dispersive optics, e.g. a prism or prisms, diffraction grating, or other one-dimensional (1-D) or two-dimensional (2-D) dispersive optics such as wavelength beam combining or WBC optics, 105 a, followed by a Fourier transform lens, collimating lens, collimating mirror, or other beam redirecting optic, 105 b; and, 1-D or 2-D laser amplifier array, 107, with phase actuators, 109. The output beam, 111, from the mode-locked master oscillator is split into its spectral components, 113, by the 1-D or 2-D dispersive optics, 105 a. Each spectral component is mapped by Fourier transform lens, 105 b, onto an element in the laser amplifier array, 107. In this array, 107, each array element, 107 a, 107 b, and 107 c, is individually addressable so that the individual phases can be actuated independently. Although three amplifiers, 107 a, 107 b, and 107 c, comprise array, 107, in this example, any arbitrary number of amplifiers can be used. Each amplifier, 107 a, 107 b, and 107 c, is seeded by one or more than one spectral components. The spectral components are amplified by the amplifier array, 107. Each amplifier, 107 a, 107 b, and 107 c, is double-passed; i.e., the beam passes through the amplifier twice, once in each direction. Upon the separate spectral components output by the amplifiers, 107 a, 107 b, and 107 c, passing back through the wavelength separating optics, 105, the output becomes a single beam, and then the output path, 115, is separated from the input path, i.e., the output beam, 111, of the seed oscillator, by the Faraday isolator, 103. If the phases of the amplifiers, 107 a, 107 b, and 107 c, are randomized then the output will be continuous wave (CW). If there is a fixed phase relationship amongst the amplifiers, 107 a, 107 b, and 107 c, then the output will be mode-locked. To ensure that there is a fixed phase relationship amongst the amplifiers, 107 a, 107 b, and 107 c, the phases of the output beam are detected and corrected. This can be done, for example, using a self-referenced or self-synchronous coherent beam combining technique (LOCSET) or stochastic parallel gradient descent (SPGD) technique. The individually addressed phase actuation as shown inFIG. 1 can be done, for example, by changing the current (for diode lasers) of each amplifier. Other phase actuators can also be used.FIG. 1 shows one architecture using an SPGD phase controller. The output beam, 115, is sampled, 117, and focused onto a single non-linear crystal, 119. The output, 121, from the non-linear crystal, 119, is detected by a single photo-detector, 123. The output, 125, of the detector, 123, is passed to the SPGD phase controller, 109. Non-linear conversion is highly dependent on peak power and, thus, phasing is accomplished by maximizing the output from the photo-detector. To generate CW power, the output, 125, from the non-linear crystal, 119, is minimized. - In the described, folded embodiment the amplifier array, 107, and wavelength separating optics, 105, are each used twice, as the beam traverses them first in one direction and then returns in the opposite direction. Thus, after the wavelength-separated beams pass through the amplifier array, 107, once in each direction, they then pass through optics, 105, which recombines the amplified beams into a single amplified beam. The isolator, 103, serves to extract the amplified beam using beam polarization to permit the output beam, 115, to be selectively directed out by polarizer, 103 a, providing a high rejection ratio of power in the output beam, 115, to power leaking back to the seed oscillator, 101. Preventing power leaking back to the seed oscillator, 101, is important to prevent undesirable feedback effects in the oscillator.
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FIG. 2 is a schematic block diagram showing a basic unfolded architecture for generating high power CW or ultrafast lasers according to aspects of embodiments of the invention. The principles of operation of these embodiments, now described, are similar to those shown and described in connection withFIG. 1 ; however, in unfolded embodiments, the amplified beam does not need to pass through an isolator. An isolator is still desired between the mode-locked seed and the rest of the system to prevent any unwanted feedback from reaching, and affecting performance of, the seed oscillator. - Systems according to the illustrated unfolded architecture include a mode-locked master oscillator, 101; a Faraday isolator, 203, with integral polarizer (not shown) which must reject any returned beam before it reaches the oscillator, 101; wavelength separating optics, 205, including dispersive optics, e.g. a prism or prisms, diffraction grating, or other one-dimensional (1-D) or two-dimensional (2-D) dispersive optics such as wavelength beam combining or WBC optics, 205 a, followed by a Fourier transform lens, collimating lens, collimating mirror, or other beam redirecting optic, 205 b; and, 1-D or 2-D laser amplifier array, 207, with phase actuators, 109. The output beam, 111, from the mode-locked master oscillator is split into its spectral components, 213, by the 1-D or 2-D dispersive optics, 205 a. Each spectral component is mapped by Fourier transform lens, 205 b, onto an element in the laser amplifier array, 207. In this array, 207, each array element, 207 a, 207 b, and 207 c, is individually addressable so that the individual phases can be actuated independently. Although three amplifiers, 207 a, 207 b, and 207 c, comprise array, 207, in this example, any arbitrary number of amplifiers can be used. Each amplifier, 207 a, 207 b, and 207 c, is seeded by one or more than one spectral components. The spectral components are amplified by the amplifier array, 207. Unlike in the embodiments illustrated by
FIG. 1 , each amplifier, 207 a, 207 b, and 207 c, is single-passed; i.e., the beam passes through the amplifier only once, in one direction. Upon the separate spectral components output, 214, by the amplifiers, 207 a, 207 b, and 207 c, passing through the wavelength combining optics, 206, the output becomes a single beam. A Fourier transform lens, 206 b, redirects the output beams, 214, onto dispersive optics, 206 a, where they are combined into a single output beam, 215. If the phases of the amplifiers, 207 a, 207 b, and 207 c, are randomized then the output will be continuous wave (CW). If there is a fixed phase relationship amongst the amplifiers, 207 a, 207 b, and 207 c, then the output will be mode-locked. To ensure that there is a fixed phase relationship amongst the amplifiers, 207 a, 207 b, and 207 c, the phases of the output beam are detected and corrected. This can be done, for example, using a self-referenced or self-synchronous coherent beam combining technique (LOCSET) or stochastic parallel gradient descent (SPGD) technique. The individually addressed phase actuation as shown inFIG. 2 can be done, for example, by changing the current (for diode lasers) of each amplifier. Other phase actuators can also be used.FIG. 2 , likeFIG. 1 , shows one architecture using an SPGD phase controller. The output beam, 215, is sampled, 117, as described in connection withFIG. 1 , and focused onto a single non-linear crystal, 119. The output, 121, from the non-linear crystal, 119, is detected by a single photo-detector, 123. The output, 125, of the detector, 123, is passed to the SPGD phase controller, 109. Non-linear conversion is highly dependent on peak power and, thus, phasing is accomplished by maximizing the output from the photo-detector. To generate CW power, the output, 125, from the non-linear crystal, 119, is minimized. -
Amplifier arrays - The high-performance requirement on the AR coating can be relaxed if the waveguide is designed to receive (or output) beams from (or to) a direction that is off normal to the facet. In folded embodiments this may be achieved by employing a curved waveguide with the AR coated facet being off normal and the opposite facet having the high reflectivity coating being normal to the direction of beam travel. In unfolded embodiments the waveguide may be straight, but having an axis that is angled to the facets.
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FIG. 3 illustrates, using a flow chart, a method according to aspects of an embodiment of the invention. According to this method, an optical seed signal is generated, 301, and passed into an optical system. The seed signal is first passed through an isolator, 303, and then divided into spectrally separate components, 305. This may be done using a Faraday isolator and dispersive optics, respectively, as described above in connection withFIG. 1 . The individual spectral components are amplified, 307, and then recombined, 309, for example by returning them to the dispersive optics, where they are recombined by passing backwards through the dispersive optics toward the isolator. Alternatively, recombination, 309, can take place without folding the return beam back on the input. The recombined components are then, if a folded embodiment, passed back through the isolator, 311, after which an output beam can be extracted. Phases of the amplified components are adjusted, 313, for example by measuring the phase differences at the output beam and adjusting individually addressable amplifiers used atstep 307. The method illustrated is performed as a continuous process, rather than serially as represented in the flow chart. Of particular note, the phase adjustment is preferably a continuous feedback process. - Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and scope of the invention. Accordingly, the foregoing description and drawings are by way of example only.
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---|---|---|---|---|
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US8531772B2 (en) | 2008-11-04 | 2013-09-10 | Massachusetts Institute Of Technology | External-cavity one-dimensional multi-wavelength beam combining of two-dimensional laser elements |
US20150063380A1 (en) * | 2013-08-31 | 2015-03-05 | Jian Liu | Method and Apparatus for Generating Ultrafast, High Energy, High Power Laser Pulses |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4961195A (en) * | 1988-08-03 | 1990-10-02 | The University Of Rochester | Systems for controlling the intensity variations in a laser beam and for frequency conversion thereof |
US5694408A (en) * | 1995-06-07 | 1997-12-02 | Mcdonnell Douglas Corporation | Fiber optic laser system and associated lasing method |
US6307668B1 (en) * | 1999-10-04 | 2001-10-23 | Optigain, Inc. | Ultra-wide bandwidth fiber based optical amplifier |
US6327068B1 (en) * | 1998-05-27 | 2001-12-04 | Yeda Research And Development Co. Ltd. | Adaptive pulse compressor |
US20040057475A1 (en) * | 2002-09-24 | 2004-03-25 | Robert Frankel | High-power pulsed laser device |
US20070280325A1 (en) * | 2006-06-06 | 2007-12-06 | Wang Gary Y | Multimode MOPA with thermal lens compensation |
US20080089698A1 (en) * | 2006-05-19 | 2008-04-17 | Zhi Jiang | Optical arbitrary waveform generation and processing using spectral line-by-line pulse shaping |
Family Cites Families (85)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4467468A (en) | 1981-12-28 | 1984-08-21 | At&T Bell Laboratories | Optical communication system |
US4786129A (en) | 1985-06-19 | 1988-11-22 | British Telecommuncations | Optical coupling assembly |
GB8713794D0 (en) | 1987-06-12 | 1987-07-15 | British Telecomm | Optical multiplexing |
DE3853935T2 (en) | 1987-09-30 | 1995-10-12 | Nec Corp | Time and wavelength division multiplexed switching system. |
US5076672A (en) | 1988-09-20 | 1991-12-31 | Nippon Telegraph & Telephone Corporation | All-optical switch apparatus using a nonlinear etalon |
US5009658A (en) | 1989-04-14 | 1991-04-23 | Karl Storz Endoscopy-America, Inc. | Dual frequency laser lithotripter |
US5095487A (en) | 1990-12-14 | 1992-03-10 | The University Of Rochester | System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship |
FR2672178B1 (en) | 1991-01-29 | 1994-03-18 | Alcatel Cit | PHOTON CONCENTRATOR. |
FR2672173B1 (en) | 1991-01-29 | 1993-09-03 | Cit Alcatel | TEMPORAL PHOTONIC MULTIPLEXER, AND PHOTONIC TEMPORAL DEMULTIPLEXER. |
CA2061141C (en) | 1991-02-14 | 1996-09-10 | Makoto Nishio | Optical switching system for optical wavelength-division and time-division multiplexed signals |
US5329396A (en) | 1992-10-28 | 1994-07-12 | At&T Bell Laboratories | Reduction of stimulated brillouin scattering in a fiber optic transmission system |
FR2715015B1 (en) | 1994-01-07 | 1996-02-02 | Auffret Rene | Method and device for transmitting and routing packets in an optical network. |
US5631758A (en) | 1995-10-26 | 1997-05-20 | Lucent Technologies Inc. | Chirped-pulse multiple wavelength telecommunications system |
US5761234A (en) | 1996-07-09 | 1998-06-02 | Sdl, Inc. | High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication systems |
US5861965A (en) | 1996-08-30 | 1999-01-19 | Lucent Technologies Inc. | Optical communication system employing spectrally sliced optical source |
US6212310B1 (en) | 1996-10-22 | 2001-04-03 | Sdl, Inc. | High power fiber gain media system achieved through power scaling via multiplexing |
US5892607A (en) | 1996-10-23 | 1999-04-06 | Scientific-Atlanta, Inc. | Suppression of stimulated brillouin scattering in optical transmission system |
US6137604A (en) | 1996-12-04 | 2000-10-24 | Tyco Submarine Systems, Ltd. | Chromatic dispersion compensation in wavelength division multiplexed optical transmission systems |
US6141127A (en) | 1998-02-20 | 2000-10-31 | Lucent Technologies Inc. | High capacity chirped-pulse wavelength-division multiplexed communication method and apparatus |
US20010017720A1 (en) | 1998-05-08 | 2001-08-30 | Hait John N. | Combination photonic time and wavelength division demultiplexing method |
US6256124B1 (en) | 1998-05-08 | 2001-07-03 | All Optical Networks, Inc. | Combination photonic time and wavelength division multiplexer |
US6100831A (en) | 1998-06-30 | 2000-08-08 | The United States Of America As Represented By The Secretary Of The Navy | Optoelectronic analog-to-digital converter using wavelength division multiplexing |
US6327292B1 (en) | 1998-09-08 | 2001-12-04 | Massachusetts Institute Of Technology | External cavity laser source using spectral beam combining in two dimensions |
US6192062B1 (en) | 1998-09-08 | 2001-02-20 | Massachusetts Institute Of Technology | Beam combining of diode laser array elements for high brightness and power |
US6381048B1 (en) | 1998-09-15 | 2002-04-30 | Lucent Technologies Inc. | Wavelength division multiplexed system having reduced cross-phase modulation |
US6330388B1 (en) | 1999-01-27 | 2001-12-11 | Northstar Photonics, Inc. | Method and apparatus for waveguide optics and devices |
US7272319B1 (en) | 1999-03-04 | 2007-09-18 | Lucent Technologies Inc. | System and method for secure multiple wavelength communication on optical fibers |
US6252693B1 (en) | 1999-05-20 | 2001-06-26 | Ortel Corporation | Apparatus and method for reducing impairments from nonlinear fiber effects in 1550 nanometer external modulation links |
US6061369A (en) | 1999-06-01 | 2000-05-09 | Corning Incorporated | Wavelength selectable fiber laser system |
US6434175B1 (en) | 1999-08-31 | 2002-08-13 | Corning Incorporated | Multiwavelength distributed bragg reflector phased array laser |
US6356576B1 (en) | 1999-11-29 | 2002-03-12 | Cymer, Inc. | Deep ultraviolet catadioptric anamorphic telescope |
JP2001274772A (en) | 2000-03-24 | 2001-10-05 | Kddi Corp | Tdm optical muttiplexer, tdm optical demultiplexer, wdm/ tdm converter and tdm/wdm converter |
US6400871B1 (en) | 2000-05-19 | 2002-06-04 | Hrl Laboratories, Llc | Phase control mechanism for coherent fiber amplifier arrays |
US6678294B1 (en) | 2000-11-06 | 2004-01-13 | Northrop Grumman Corporation | Distributed feedback laser apparatus for avoiding stimulated brillouin scattering |
WO2002071119A1 (en) | 2001-03-01 | 2002-09-12 | Zolo Technologies, Inc. | (de)multiplexer with four "f" configuration and hybrid lens |
US6570704B2 (en) | 2001-03-14 | 2003-05-27 | Northrop Grumman Corporation | High average power chirped pulse fiber amplifier array |
US7039076B2 (en) | 2001-08-10 | 2006-05-02 | Jds Uniphase Corporation | Fiber amplifier system for producing visible light |
EP1436870A2 (en) | 2001-10-09 | 2004-07-14 | Infinera Corporation | TRANSMITTER PHOTONIC INTEGRATED CIRCUITS (TxPIC) AND OPTICAL TRANSPORT NETWORKS EMPLOYING TxPICs |
US7125632B2 (en) | 2002-03-15 | 2006-10-24 | Pd-Ld, Inc. | Fiber optic devices having volume Bragg grating elements |
US7574139B2 (en) | 2002-05-31 | 2009-08-11 | Oplink Communications, Inc. | Carrier-suppressed optical time domain multiplexing |
US6763054B2 (en) | 2002-11-19 | 2004-07-13 | The Boeing Company | Optical system for improving the brightness of a stack of lensed diode lasers |
US7339727B1 (en) | 2003-01-30 | 2008-03-04 | Northrop Grumman Corporation | Method and system for diffractive beam combining using DOE combiner with passive phase control |
US7340172B2 (en) | 2003-04-10 | 2008-03-04 | Lucent Technologies Inc. | Optical WDM-TDM network |
US7020168B2 (en) | 2003-07-01 | 2006-03-28 | Lucent Technologies Inc. | High power multi-frequency laser |
CA2531122A1 (en) | 2003-07-03 | 2005-02-10 | Pd-Ld, Inc. | Use of volume bragg gratings for the conditioning of laser emission characteristics |
KR100575953B1 (en) | 2003-10-27 | 2006-05-02 | 삼성전자주식회사 | Optical signal transmitter with reflective gain clamped semiconductor optical amplifier and optical communicating system using thereof |
KR20050070566A (en) | 2003-12-30 | 2005-07-07 | 삼성전자주식회사 | Multi-wavelength light source and wavelength-division multiplexing system using the same |
JPWO2005085947A1 (en) | 2004-03-08 | 2008-01-24 | 株式会社ニコン | LASER LIGHT SOURCE DEVICE, EXPOSURE DEVICE AND MASK INSPECTION DEVICE USING THIS LASER LIGHT SOURCE DEVICE |
US7376349B2 (en) | 2004-04-07 | 2008-05-20 | The Boeing Company | Analog to digital converter systems and methods |
US7495816B2 (en) | 2004-07-23 | 2009-02-24 | Massachusetts Institute Of Technology | Diffraction-based pulse shaping with a 2D optical modulator |
US7508853B2 (en) | 2004-12-07 | 2009-03-24 | Imra, America, Inc. | Yb: and Nd: mode-locked oscillators and fiber systems incorporated in solid-state short pulse laser systems |
WO2006072183A2 (en) | 2005-01-10 | 2006-07-13 | Kresimir Franjic | LASER SYSTEM FOR GENERATION OF HIGH-POWER SUB-NANOSECOND PULSES WITH CONTROLLABLE WAVELENGTHS IN 2-15 um REGION |
US7199924B1 (en) | 2005-01-26 | 2007-04-03 | Aculight Corporation | Apparatus and method for spectral-beam combining of high-power fiber lasers |
US7949030B2 (en) | 2005-02-03 | 2011-05-24 | Pd-Ld, Inc. | High-power, phased-locked, laser arrays |
JP4561403B2 (en) | 2005-02-25 | 2010-10-13 | 沖電気工業株式会社 | Optical division multiplexing transmission / reception method and optical division multiplexing transmission / reception apparatus |
FR2883384B1 (en) | 2005-03-18 | 2008-01-18 | Thales Sa | OPTICAL DEVICE FOR WAVELENGTH MULTIPLEXING |
JP2006313858A (en) | 2005-05-09 | 2006-11-16 | Sumitomo Electric Ind Ltd | Laser source, laser oscillation method, and laser processing method |
JP4841214B2 (en) | 2005-09-30 | 2011-12-21 | 株式会社ニデック | Medical laser equipment |
US7809222B2 (en) | 2005-10-17 | 2010-10-05 | Imra America, Inc. | Laser based frequency standards and their applications |
US7336363B2 (en) | 2005-10-19 | 2008-02-26 | Northrop Grumman Corporation | Interferometric beam combination |
JP2007165624A (en) | 2005-12-14 | 2007-06-28 | Sony Corp | Irradiation apparatus |
JP2007194764A (en) | 2006-01-18 | 2007-08-02 | Hitachi Ltd | Operation management system |
US7440174B2 (en) | 2006-02-24 | 2008-10-21 | Northrop Grumman Corporation | Coherent fiber diffractive optical element beam combiner |
US7239777B1 (en) | 2006-03-09 | 2007-07-03 | Lockheed Martin Coherent Technologies, Inc. | Method and apparatus to coherently combine high-power beams in self-imaging waveguides |
JP4706556B2 (en) | 2006-05-23 | 2011-06-22 | 沖電気工業株式会社 | Optical multiplex communication system and delay adjustment method |
US7468832B2 (en) | 2006-10-05 | 2008-12-23 | Northrop Grumman Corporation | Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler |
US7436588B2 (en) | 2006-10-05 | 2008-10-14 | Northrop Grumman Corporation | Method and system for hybrid coherent and incoherent diffractive beam combining |
US7346085B1 (en) | 2006-10-05 | 2008-03-18 | Northrop Grumman Corporation | Multi-stage method and system for coherent diffractive beam combining |
WO2008127451A2 (en) | 2006-12-01 | 2008-10-23 | Cornell Research Foundation, Inc. | Divided-pulse amplification of short pulses |
US8179594B1 (en) | 2007-06-29 | 2012-05-15 | Lockheed Martin Corporation | Method and apparatus for spectral-beam combining of fanned-in laser beams with chromatic-dispersion compensation using a plurality of diffractive gratings |
EP2248233B1 (en) | 2008-02-07 | 2018-04-04 | Imra America, Inc. | High power parallel fiber arrays |
US8023538B2 (en) | 2008-03-27 | 2011-09-20 | Imra America, Inc. | Ultra-high power parametric amplifier system at high repetition rates |
US8440951B2 (en) | 2008-07-09 | 2013-05-14 | Panasonic Corporation | Wavelength conversion laser light source having dual optical receiver and a temperature control unit, and projection display device, liquid crystal display device and laser light source provided with same |
US8125704B2 (en) | 2008-08-18 | 2012-02-28 | Raydiance, Inc. | Systems and methods for controlling a pulsed laser by combining laser signals |
US7764720B1 (en) | 2008-08-26 | 2010-07-27 | The United States Of America As Represented By The Secretary Of The Air Force | Multi-tone driven high-power narrow-linewidth rare earth doped fiber amplifier |
US8049966B2 (en) | 2008-11-04 | 2011-11-01 | Massachusetts Institute Of Technology | External-cavity one-dimensional multi-wavelength beam combining of two-dimensional laser elements |
US8514485B2 (en) | 2009-08-07 | 2013-08-20 | Northrop Grumman Systems Corporation | Passive all-fiber integrated high power coherent beam combination |
US8830566B2 (en) | 2009-08-07 | 2014-09-09 | Northrop Grumman Systems Corporation | Multi-channel fiber laser amplifier combining apparatus including integrated spectral beam combination and a tapered fiber bundle having multiple fiber outputs |
US8184361B2 (en) | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | Integrated spectral and all-fiber coherent beam combination |
US8184363B2 (en) | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | All-fiber integrated high power coherent beam combination |
US20110305256A1 (en) | 2010-03-05 | 2011-12-15 | TeraDiode, Inc. | Wavelength beam combining based laser pumps |
US9620928B2 (en) | 2010-07-16 | 2017-04-11 | Massachusetts Institute Of Technology | Continuous wave or ultrafast lasers |
US8493650B2 (en) | 2011-01-21 | 2013-07-23 | Northrop Grumman Systems Corporation | Method and apparatus for suppression of four-wave mixing using polarization control with a high power polarization maintaining fiber amplifier system |
US20120219021A1 (en) | 2011-02-25 | 2012-08-30 | Laser Light Engines | Laser Display Method and System |
US8995049B2 (en) | 2011-09-08 | 2015-03-31 | Northrop Grumman Systems Corporation | Method and apparatus for suppression of stimulated brillouin scattering using polarization control with a birefringent delay element |
-
2010
- 2010-07-16 US US12/837,530 patent/US9620928B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4961195A (en) * | 1988-08-03 | 1990-10-02 | The University Of Rochester | Systems for controlling the intensity variations in a laser beam and for frequency conversion thereof |
US5694408A (en) * | 1995-06-07 | 1997-12-02 | Mcdonnell Douglas Corporation | Fiber optic laser system and associated lasing method |
US6327068B1 (en) * | 1998-05-27 | 2001-12-04 | Yeda Research And Development Co. Ltd. | Adaptive pulse compressor |
US6307668B1 (en) * | 1999-10-04 | 2001-10-23 | Optigain, Inc. | Ultra-wide bandwidth fiber based optical amplifier |
US20040057475A1 (en) * | 2002-09-24 | 2004-03-25 | Robert Frankel | High-power pulsed laser device |
US20080089698A1 (en) * | 2006-05-19 | 2008-04-17 | Zhi Jiang | Optical arbitrary waveform generation and processing using spectral line-by-line pulse shaping |
US20070280325A1 (en) * | 2006-06-06 | 2007-12-06 | Wang Gary Y | Multimode MOPA with thermal lens compensation |
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US10985534B2 (en) * | 2018-05-22 | 2021-04-20 | Panasonic Intellectual Property Management Co., Ltd. | Power and spectral monitoring in wavelength beam combining laser systems |
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